The Spyder MR4 paintball gun features the extremely efficient Valve System capable of 1,800 shots from a 20oz CO2 Tank, which also reduces the recoil for smooth firing! This tactical powerhouse delivers a realistic military look including multiple Picatinny Rails for endless scenario modifications. The Spyder MR4 is a great paintball gun for woods ball and recreational use. It is extremely light-weight, powerful, low maintenance and extremely durable.The modern superpower has arrived!